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Although reconfigurable intelligent surfaces (RISs) have demonstrated the potential to boost network capacity and expand coverage by adjusting their electromagnetic properties, existing RIS architectures have certain limitations, such as…

Signal Processing · Electrical Eng. & Systems 2024-05-28 Wanli Ni , Ailing Zheng , Wen Wang , Dusit Niyato , Naofal Al-Dhahir , Merouane Debbah

More and more applications that require high reliability and fault tolerance are realized with wireless network architectures and thus ultimately rely on the wireless channels, which can be subject to impairments and blockages. Hence, these…

Systems and Control · Electrical Eng. & Systems 2022-11-02 Kevin Weinberger , Robert-Jeron Reifert , Aydin Sezgin , Ertugrul Basar

Reconfigurable Intelligent Surfaces (RIS) are an emerging technology that can be used to reconfigure the propagation environment to improve cellular communication link rates. RIS, which are thin metasurfaces composed of discrete elements,…

Signal Processing · Electrical Eng. & Systems 2020-11-11 Pooja Nuti , Brian L. Evans

Recent advances in the fabrication and experimentation of Reconfigurable Intelligent Surfaces (RISs) have motivated the concept of the smart radio environment, according to which the propagation of information-bearing waveforms in the…

Information Theory · Computer Science 2021-07-27 George C. Alexandropoulos , Nir Shlezinger , Philipp del Hougne

Reconfigurable intelligent surface (RIS) has been widely discussed as new technology to improve wireless communication performance. Based on the unique design of RIS, its elements can reflect, refract, absorb, or focus the incoming waves…

Signal Processing · Electrical Eng. & Systems 2020-09-03 Salah Eddine Zegrar , Liza Afeef , Huseyin Arslan

Reconfigurable intelligent surface (RIS)-empowered communication is a revolutionary technology that enables to manipulate wireless propagation environment via smartly controllable low-cost reflecting surfaces. However, in order to…

Information Theory · Computer Science 2022-12-13 Zehra Yigit , Ertugrul Basar , Ibrahim Altunbas

Reconfigurable intelligent surfaces (RISs) are typically used in multi-user systems to mitigate interference among active transmitters. In contrast, this paper studies a setting with a conventional active encoder as well as a passive…

Information Theory · Computer Science 2021-01-20 Roy Karasik , Osvaldo Simeone , Marco Di Renzo , Shlomo Shamai

Reconfigurable intelligent surfaces (RISs) have been introduced as arrays of nearly passive elements with software-tunable electromagnetic properties to dynamically manipulate the reflection/transmission of radio signals. Research works in…

Systems and Control · Electrical Eng. & Systems 2025-07-01 Mehdi Monemi , Mehdi Rasti , Arthur S. de Sena , Mohammad Amir Fallah , Matti Latva-Aho , Marco Di Renzo

A wireless communication system is studied that operates in the presence of multiple reconfigurable intelligent surfaces (RISs). In particular, a multi-operator environment is considered where each operator utilizes an RIS to enhance its…

Information Theory · Computer Science 2024-03-04 Nikolaos I. Miridakis , Theodoros A. Tsiftsis , Panagiotis A. Karkazis , Helen C. Leligou , Petar Popovski

On-chip reconfigurable intelligent surfaces (RIS) are expected to play a vital role in future 6G communication systems. This work proposed a CMOS-compatible on-chip RIS capable of achieving beam steering for the first time. The proposed…

Signal Processing · Electrical Eng. & Systems 2025-12-23 Xiarui Su , Xihui Teng , Yiyang Yu , Yiming Yang , Atif Shamim

Reconfigurable intelligent surface (RIS) has recently emerged as a promising technology enabling next-generation wireless networks. In this letter, we develop an improved index modulation (IM) scheme by utilizing RIS to convey information.…

Information Theory · Computer Science 2023-06-02 Hao Liu , Jiancheng An , Wangyang Xu , Xing Jia , Lu Gan , Chau Yuen

A reconfigurable intelligent surface (RIS) is composed of low-cost elements that manipulate the propagation environment from a transmitter by intelligently applying phase shifts to incoming signals before they are reflected. This paper…

Information Theory · Computer Science 2024-07-23 Mohammad Javad-Kalbasi , Mohammed Saif , Shahrokh Valaee

Reconfigurable intelligent surfaces (RISs) have been deemed as one of potential components of future wireless communication systems because they can adaptively manipulate the wireless propagation environment with low-cost passive devices.…

Signal Processing · Electrical Eng. & Systems 2022-03-23 Yanan Ma , Rang Liu , Yang Liu , Ming Li , Qian Liu

The reconfigurable intelligent surfaces detection and identification (RISs-ID) is a critical process that enables a base station (BS) to adaptively assign the appropriate RIS to a given user equipment (UE). This work proposes a novel…

Signal Processing · Electrical Eng. & Systems 2026-05-19 Aymen Khaleel , Adam Umra , Aydin Sezgin

Reconfigurable Intelligent Surfaces (RISs) are an emerging technology for future wireless communication systems, enabling improved coverage in an energy efficient manner. RISs are usually metasurfaces, constituting of two-dimensional…

Information Theory · Computer Science 2022-03-28 Konstantinos D. Katsanos , Nir Shlezinger , Mohammadreza F. Imani , George C. Alexandropoulos

Reconfigurable intelligent surface (RIS)-empowered communication stands out as a solid candidate for future wireless networks due to its flexibility, ease of deployment, and attractive advantages to control the wireless propagation…

Information Theory · Computer Science 2023-04-13 Ertugrul Basar

This paper explores distributed Reconfigurable Intelligent Surfaces (RISs) by introducing a cooperative dimension that enhances adaptability and performance. It focuses on strategically deploying multiple RISs to improve connectivity with…

Signal Processing · Electrical Eng. & Systems 2024-11-13 Youssef Hussein , Mohamad Assaad , Thierry Clessienne

Reconfigurable Intelligent Surfaces (RISs) have emerged as a promising technology for next-generation wireless communications, offering energy-efficient control of electromagnetic (EM) waves. While conventional RIS models based on phase…

Information Theory · Computer Science 2025-08-12 Ayane Lebeta Goshu , Placido Mursia , Vincenzo Sciancalepore , Marco Di Renzo , Xavier Costa-Pérez

Intelligent reflecting surface (IRS) is deemed as a promising and revolutionizing technology for future wireless communication systems owing to its capability to intelligently change the propagation environment and introduce a new dimension…

Signal Processing · Electrical Eng. & Systems 2021-01-06 Wenhao Cai , Rang Liu , Yang Liu , Ming Li , Qian Liu

Wireless communications are nowadays shifting to higher operation frequencies with the aim to meet the ever-increasing demand for bandwidth. While reconfigurable intelligent surfaces (RISs) are usually envisioned to restore the…

Signal Processing · Electrical Eng. & Systems 2024-05-02 Giorgos Stratidakis , Sotiris Droulias , Angeliki Alexiou